Metal-plan ing machine



(H0 Madam 2 Sheets-Sheet 1.

F. F. DENNIS.

METAL PLANING MACHINE.

N0. 335,744. Patented; Feb. 9 1886;

N. FEIERS, Phmo-Limogn her. Wzuhmgwn, D c.

I 2 Sheets-Sheet 2.

(No Model.)

F. P. DENNIS.

METAL PLANING MAGHINE.

Patented Feb. 9, 1886.

lTED STATES PATENT OFFICE.

FRED F. DENNIS, OF WORCESTER, MASSACHUSETTS.

METAL-PLANING MACHINE.

SPECIFICATION forming part of Letters Patent No. 335,744, dated February9, 1886.

To all whom it may concern:

Be it known that I, FRED F. DENNIS, acitizen of the United States,residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented a newand useful Improvement inMetal-Planing Machines, of which the following isaspecification,accompanied by drawings illustrating the features of myinvention, and in which-- Figure 1 is a side elevation of ametal-planing machine. Fig. 2 is a top view of the driving-shafts,showing part of the frame in section. Fig. 3 is aside and detached Viewof a portion of the feeding mechanism. Fig. 4 is a sectional view of apart of the feeding mechanism. Fig. 5 is an inside view of the feedingmechanism. Fig. 6 shows an inside view of the feeding mechanism similarto that shown in Fig. 5, except that the several parts are representedat one end of their motion; and Fig. 7 shows the same view with theparts represented at the opposite endof their motion.

Similar letters refer to similar parts in the several views.

My invention relates to that portion of a metal-planing machine known asthe friction feed, as hereinafter set forth and described.

The construction and operation of metalplaning machines are too wellknown to require a detailed description. Ihave therefore herein confinedmyself specially to that portion forming the subject of my invention.

The several shafts shown in Fig. 2 have a rotary motion in oppositedirection as the two drivingbelts a a are alternately transferred fromthe loose pulleys b b to the tight pulleys c c on the shaft d, and areciprocating motion is thus given to the table B along ways upon thebed A by means of a rack (not shown) en gaging the gear e,driven throughintermediate gearing with the shaft (2. Upon the shaft f, I attach awheel, g,with a flange, g, on its side, and having a reciprocatingrotary motion as determined by the alternate action of the belts a a.Turning loosely upon the hub g of the wheel 9 is a shell, h, having ahub, h, with recesses h If, to receive the ends of the drivingdogs is k.The shell h, I hold in position by means of the collar h and upon theface of the shell h, I attach the plate-wheel j with a slot, j, carryinga stud, j, which may be adj usted radially to vary the motion of thegeared (No model.)

rack j, sliding in ways in the head of the planing-machine, and whichactuates, through a pawl-and-ratchet device, a feed-screw, therebygiving an intermittent 'motion to the cuttingtool in a manner familiarto all acquainted with machines of this class.

. NVithin the shell h, I place the two drivingdogs is It, each having atransverse slot, k, inclosing the flange g. The points k of the dogs itrest in the recesses h If and slightly in advance of a radial linepassing through the point of contact of the dog k with the flange asindicated by the broken line I.

The slots in the dogs are somewhat wider than the thickness of theflange g, and to each dog I attach a spring, at, also attached to a pinor stud, a, in the shell h, the tension of the spring holding the dogswith the corners o 0 brought against the outer and inner surfaces of theflange 9.

When the motion of the wheel 9 is in the direction of the arrow 2, Figs.5 and 6, the flange y will be engaged by the corners 0 0 of theright-hand dog, 5, as shown in Fig. '6, carrying the dog and shell haround in the direction of the arrows 2, Fig. 6, until the dog 5 isbrought against a stationary pin, 1), attached to the frame of themachine, and entering the space between the flange g and the outer rimof the shell h, thereby limiting the motion of the dog, its pressureagainst the pin 1) releasing it from its engagement with the rotatingflange g and stopping the motion of the shell 71.

Whenever the rotary motion of the wheel g and shell 9 is reversed, asindicated by the arrows 3, Fig. 7, the corners 0 0 of the lefthand dog,6, as shown in Fig. 7, will engage the flange 9, and the motion of theshell h will be reversed until the dog 6 is in turn brought against thefixed pin 1), thereby limiting its motion, the pressure of the dogagainst the pin 19 releasing it from its engagement with the flange gand stopping the motion of the shell h.

Upon the inner side of the shell h, I place the projections q and g,which, by the momentum of the shell, are brought against the dogs 5 and6 as they are respectively brought against the fixed pin 1), therebydetermining the exact limit of the motion of the shell h. It will thusbe seen that, however long the rotary motion of the wheel 9 and flange 9may be continued, the motion of the shell h and attached disk j will belimited to the distance between the two dogs k k, which I have in thepresent instance shown to be about one-third of the circumference of theshell h, but which may be varied, if desired.

By placing the dogs kk on the lower side of the shell h, as shown inFig. 5, the springs m m may be omitted or their tension reduced, as theweight of the dogs will tend to press the corners 0 0 against the flangein position to immediately engage the same.

The contact of the dogs 70 k with the wheel 9 and shell h is limited tothe annular raised surfaces 1'1", thereby reducing the friction and thesurface requiring to be finished.

. WVhat I claim as my invention, and desire to secure by Letters Patent,is-- 1. The combination, with one of the shafts of a metal-planingmachine towhich a rotary motion is alternately given in oppositedirections by the action of the driving mechanism, substantially asdescribed, of a wheel attached to said shaft and having an annularflange on its side, ashell turning loosely and concentrically about saidshaft, two dogs with their inner ends recessed in the hub of the shell,and having transverse slots forming corners adapted to engage theannular flange, and a pin attached to the frame of the machine andentering the shell in the path of the outer ends of said dogs as theyare carried around said shaft, all arranged and operating substantiallyas described, whereby the shell is given a rotary motion alternately inopposite directions, but of limited extent, and means,substant ially asdescribed, whereby said shell is connected with the feeding mechanism,as and for the purpose set forth.

2. The co1nbination,with the shaft f, carrying a wheel,"g, having aflange, g, of a shell, h, dogs is k, adapted to engage the flange 9,fixed pin p, and shell it, having projections q and q, as and for thepurpose set forth.

FRED F. DENNIS.

WVitnesses:

K. H. ELLIS, RUFUS BENNETT FOWLER.

